#ifndef _MEventMessage
#define _MEventMessage
//-
// ==========================================================================
// Copyright (C) 1995 - 2006 Autodesk, Inc., and/or its licensors.  All
// rights reserved.
//
// The coded instructions, statements, computer programs, and/or related
// material (collectively the "Data") in these files contain unpublished
// information proprietary to Autodesk, Inc. ("Autodesk") and/or its
// licensors,  which is protected by U.S. and Canadian federal copyright law
// and by international treaties.
//
// The Data may not be disclosed or distributed to third parties or be
// copied or duplicated, in whole or in part, without the prior written
// consent of Autodesk.
//
// The copyright notices in the Software and this entire statement,
// including the above license grant, this restriction and the following
// disclaimer, must be included in all copies of the Software, in whole
// or in part, and all derivative works of the Software, unless such copies
// or derivative works are solely in the form of machine-executable object
// code generated by a source language processor.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
// AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED
// WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF
// NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
// OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO
// EVENT WILL AUTODESK AND/OR ITS LICENSORS BE LIABLE FOR ANY LOST
// REVENUES, DATA, OR PROFITS, OR SPECIAL, DIRECT, INDIRECT, OR
// CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK AND/OR ITS LICENSORS HAS
// BEEN ADVISED OF THE POSSIBILITY OR PROBABILITY OF SUCH DAMAGES.
// ==========================================================================
//+
//
// CLASS:    MEventMessage
//
// ****************************************************************************

#if defined __cplusplus

// ****************************************************************************
// INCLUDED HEADER FILES


#include <maya/MMessage.h>
#include <maya/MStringArray.h>

// ****************************************************************************
// CLASS DECLARATION (MEventMessage)

//! \ingroup OpenMaya
//! \brief Event messages.
/*!
	This class is used to register callbacks for specific events.

	The first parameter passed to the add callback method is the name
	of the event that will trigger the callback.  The list of
	available event names can be retrieved by calling the
	getEventNames method or by using the -listEvents flag on the
	<a href="../Commands/scriptJob.html">scriptJob</a> command.

	The add callback method returns an id which is used to remove the
	callback.

    To remove a callback use MMessage::removeCallback.

	All callbacks that are registered by a plug-in must be removed by
	that plug-in when it is unloaded.  Failure to do so will result in
	a fatal error.
*/
class OPENMAYA_EXPORT MEventMessage : public MMessage
{
public:
	static MCallbackId	addEventCallback(
								const MString& event,
								MMessage::MBasicFunction func,
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL );

	static MStatus		getEventNames( MStringArray & names );

	static const char* className();
};

#endif /* __cplusplus */
#endif /* _MEventMessage */
